.TH ECC 1 "June 9,1992".AT 3.SH NAMEecc \-\- Reed \- Solomon Error Correcting Coder.SH SYNOPSIS.B ecc[.B \-edv] .SH DESCRIPTION.I Eccreads blocks of bytes from stdin, applies the (255,249,7) Reed - SolomonError Correcting block code, and writes the resulting block to stdout.Ecc is capable of correcting three byte errors in a block of 255 bytes,and is capable of detecting more severe errors..SH OPTIONS.TP.B \-eRead blocks of 248 bytes or less from stdin, and encode them, generating six bytes of redundancy.  A 256 byte code block is then written to stdout, consisting of an ASCII letter G, a length byte, 248 bytes read from stdin andpadded as necessary, and the six redundancy bytes..TP.B \-dRead blocks of 256 bytes from stdin, and decode them.  Any errors discoveredduring the decoding process are reported to stderr.  The number of bytesindicated by the length byte are then written to stdout..TP.B \-vWrite the .I eccversion number to stderr..SH DIAGNOSTICS.TP.I "nn byte error in block xx.".I Eccfound nn error bytes in consecutive block xx, and was able to correct theerrors..TP.I "unrecoverable error in block xx."Four or more errors were detected in consecutive block xx.  The flawed blockis written uncorrected to stdout..TP.I "sync error in block xx."The block sync character G was not found.  This usually means bytes wereadded or subtracted from the stream of coded blocks..SH AUTHORPaul Flaherty (paulf@Stanford.EDU).SH "SEE ALSO"uuencode(1),dd(1).SH BUGSDoesn't automatically correct dropped bytes.